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Finding the Fourth Proportional to 518,168.41, 777,689.33 and 218,863.79

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Solution

The fourth proportional to 518,168.41, 777,689.33 and 218,863.79 is: 328,480.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,168.41 : 777,689.33 = 218,863.79 : x
  2. Step 2: Convert to fraction form
    518,168.41/777,689.33 = 218,863.79/x
  3. Step 3: Cross multiply
    518,168.41x = 777,689.33 × 218,863.79
  4. Step 4: Simplify right side
    518,168.41x = 170,208,034,206.36
  5. Step 5: Solve for x
    x = 170,208,034,206.36/518,168.41
  6. Step 6: Final answer
    x = 328,480.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.